[Medical complications connected with the use of drugs].

Aside from disease induced by the direct pharmacological effect of heroin or cocaine, the occurrence of several medical complications not directly related to the drug itself is becoming an increasingly serious problem. In addition to the well-known occurrence of infective diseases, including AIDS, related to the i.v. use of heroin, heroin addicts also seem significantly more at risk for chronic nephropathy. Amyloidotic nephropathy is especially frequent in addicts who use heroin by subcutaneous route (skin popping); it seems to be mediated by an immunologic mechanism. Amyloidotic nephropathy is the main cause of renal failure among drug addicted subjects. Cardiovascular and cerebrovascular diseases are the most frequent medical complications observed in cocaine users. However, the occurrence of infective disease, such as endocarditis or hepatitis related to the parenteral use of the drug, is becoming frequent in these patients. Pulmonary disease is also common due to the route of administration of crack. These medical complications of drug addiction belong to the specific field of internal medicine and should be promptly recognized and treated by the physician.